Xtina's Body Transformation

Christina looking tiny at the 1st Annual Teen Choice Awards at Barker Hangar in Santa Monica, California.
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<p><span style="font-size: 9px;">Photo: WireImage</span>
A frailer looking Christina waves to the crowd at the MTV Video Music Awards at the Metropolitan Opera House at in New York on September 9, 1999.
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<p><span style="font-size: 9px;">Photo: Henry Ray Abrams/AFP/Getty Images</span>
Christina Aguilera looking like a breath of fresh air as she poses for photographers, in November of 1999, at The Point in Dublin during MTV Europe Awards.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Christina revealing her flat abs at The 42nd Annual GRAMMY Awards - BMG After Party, in February of 2000.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Revealing a little more than abs...
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Christina looking healthy, posing with her award for 'Best New Artist' at the 42nd Grammy Awards Ceremony 23 February 2000 in Los Angeles, CA.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Backstage at the VH1 special concert 'Men Strike Back' 11 April, 2000, at Madison Square Garden in New York. Aguilera performed during the concert.
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<p><span style="font-size: 9px;">Photo: Stan Honda/AFP/Getty Images</span>
Showing off some leg after she was named New Entertainer of the Year during the fifth annual American Latino Media Arts Awards(ALMA) in April of 2000 in Pasadena, CA.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Looking like a total babe...
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<p><span style="font-size: 9px;">Photo: Lucy Nicholson/AFP/Getty Images</span>
Showing off a lot of leg as she sings during the Caracas Pop Festival on January 20, 2001.
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<p><span style="font-size: 9px;">Photo: Andrew Alvarez/AFP/Getty Images</span>
Pop Star Christina Aguilera arrives at the 43rd Annual Grammy Awards, swimming in her evening attire.
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<p><span style="font-size: 9px;">Photo: Lucy Nicholson/AFP/Getty Images</span>
Dressed very promiscuously at the 2001 MTV Movie Awards.
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<p><span style="font-size: 9px;">Photo: WireImage</span>
Showing off her curves as she arrived to perform at the 2001 MTV Movie Awards at the Shrine Auditorium in Los Angeles, in June of 2001.
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<p><span style="font-size: 9px;">Photo: Lucy Nicholson/AFP/Getty Images</span>
Christina Aguilera flaunting her figure at KIIS-FM's 'Wango Tango' two day concert series at Dodger Stadium in Los Angeles, Ca. 6/16/01.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Christina Aguilera wearing next to nothing at the 44th Annual Grammy Awards in 2002.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Now... wearing almost nothing at the MTV Video Music Awards in 2002.
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<p><span style="font-size: 9px;">Photo: Don Emmert/AFP/Getty Images</span>
Looking edgier than usual at the 30th Annual AMAs held at the Shrine Auditorium in Los Angeles, in 2003.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Christina Aguilera looked fit and fabulous as she performed on 7/21/03 in Chicago, IL.
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<p><span style="font-size: 9px;">Photo: WireImage</span>
Looking gorgeous in white at the 2004 MTV Movie Awards - June 5, 2004 in Culver City, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Christina showing off her curves as she attends The 13th Annual Music Video Production Association Awards in 2004 at the Orpheum Theatre in Los Angeles.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Christina looked cool, calm and collective as she sang the National Anthem before the 2004 NBA All-Star Game in Los Angeles, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Aguilera looking rocker-chic as she poses backstage during MTV's Total Request Live in February of 2004 in the Big Apple.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Singer Christina Aguilera attends the BMG Post-Grammy Party in 2004, looking a little raunchy.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Aguilera decided to class it up for the 46th Annual Grammy Awards in 2004 where she won for Best Female Pop Vocal Performance.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Channeling her inner mermaid at the 'Shark Tale' premiere at Central Park's Delacorte Theater on September 27, 2004 in New York City.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Looking quite slim and keeping it PG for the kids, Aguilera performs in front of the Sleeping Beauty Castle after launching the 'Happiest Celebration on Earth' during the Disneyland 50th Anniversary Celebration at Disneyland Park in 2005.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Singer Christina Aguilera performs in concert at the Coca-Cola Dome ahead of the F1 GP Masters race in Kyalami on November 10, 2005 in Johannesburg, South Africa. Sorry Tina, just because you're wearing a coattail doesn't make it classy.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
U.S pop star Christina Aguilera speaks during a photocall at the Mandarin Oriental hotel in London in 2006 with a bit too much cleavage for comfort.
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<p><span style="font-size: 9px;">Photo: Carl De Souza/AFP/Getty Images</span>
Looking slim and sexy, singer Christina Aguilera arrives at the MAXIM Magazine 100th Issue Celebration at the Wynn Resort in 2006 in Las Vegas, Nevada.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Singer Christina Aguilera performs onstage in a comparatively conservative leotard at the 2006 MTV Movie Awards at Sony Pictures Studio on June 3, 2006 in Culver City, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Showing off the epitome of an hourglass figure, Aguilera arrives to the 2006 MTV Movie Awards at Sony Pictures Studio on June 3,2006 in Culver City, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Singer Christina Aguilera poses backstage looking grown up, but still radiating sex appeal during MTV's Total Request Live at the MTV Times Square Studios in June of 2006.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Accentuating her tiny waist, singer Christina Aguilera arrives at Entertainment Weekly's 'Must List' party at Buddha Bar June 22, 2006 in New York City.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
U.S. pop diva Christina Aguilera strikes a pose reminiscent of her "dirty" days during the shooting of a global Pepsi commercial. The campaign featured Aguilera in a number of exotic locations, and allowed fans to download a personal performance of their choice.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Skillfully balancing classy and sexy, Christina Aguilera Celebrates the Launch of her Album "Back to Basics" - August 15, 2006
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<p><span style="font-size: 9px;">Photo: WireImage</span>
Looking absolutely stunning, singer Christina Aguilera performs onstage at the 2006 MTV Video Music Awards at Radio City Music Hall August 31, 2006 in New York City.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Dressed head to toe in '20's fashion, Aguilera attends the 2006 MTV Video Music Awards at Radio City Music Hall August 31, 2006 in New York City.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Singer Christina Aguilera performs onstage at Conde Nast Media Group's Third Annual Fashion Rocks Concert at Radio City Music Hall September 7, 2006 in New York City...should we say ahoy?
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Looking exceptionally thin, singer Christina Aguilera attends the 2007 NRJ Music Awards held at the Palais des Festivals in Cannes, France on January 20, 2007.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Christina Aguilera, awkwardly raunchy for a pregnant woman, poses for a picture on the red carpet at the nationwide launch of Rock The Vote 2008 held at Kitson in November of 2007, in Beverly Hills California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Hiding any post-pregnancy imperfections, recording artist Christina Aguilera looks great as she attends the Broad Contemporary Art Museum opening at LACMA February 9, 2008 in Los Angeles, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Trading in her "good girl" look for a night, Christina Aguilera arrives at the 2008 MTV Video Music Awards at Paramount Pictures Studios on September 7, 2008 in Los Angeles, California.
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<p><span style="font-size: 9px;">Photo: WireImage</span>
Christina Aguilera sighting on March 28, 2009 in Beverly Hills, California.
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<p><span style="font-size: 9px;">Photo: FilmMagic</span>
Christina Aguilera poses for photos on the TAO/Lavo red carpet at the Venetian on December 31, 2009 in Las Vegas, Nevada.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Rocking the bob cut, singer Christina Aguilera poses in the photo room at the 67th Annual Golden Globe Awards at the Beverly Hilton Hotel in Beverly Hills, California, January of 2010.
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<p><span style="font-size: 9px;">Photo: Valerie Macon/AFP/Getty Images</span>
Singer Christina Aguilera arrives looking sweet in pink at the opening Gala and 'Unmasking' for the Resnick Pavilion at LACMA on September 25, 2010 in Los Angeles, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
True to character, actress/singer Christina Aguilera attends the 'Burlesque' UK premiere after party at Floridita showing quite a bit of bust on December 13, 2010 in London, England.
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<p><span style="font-size: 9px;">Photo: WireImage</span>
Looking a little fuller in the cheeks, Aguilera attends the Sony Pictures Classic 68th Annual Golden Globe Awards Party held at The Beverly Hilton hotel on January 16, 2011 in Beverly Hills, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
With a bigger booty than before, Christina Aguilera arrives at the 2012 NCLR ALMA Awards at Pasadena Civic Auditorium in September 2012 in Pasadena, California.
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<p><span style="font-size: 9px;">Photo: WireImage</span>
With awful hair-coloring distracting from her recent weight fluctuation, Christina Aguilera speaks onstage during the 40th Anniversary American Music Awards nominations press conference in October 2012 in Los Angeles, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Singer Christina Aguilera attends the 40th American Music Awards dressed in purple from head to toe in November 2012 in Los Angeles, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Aguilera performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live in November 2012 in Los Angeles, California. But who can focus on her with the female body builder in the frame...
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Looking simple in black, singer Christina Aguilera arrives at a screening of NBC's 'The Voice' Season 4 at the Chinese Theatre on March 20, 2013 in Los Angeles, California.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Singer-songwriter Christina Aguilera understands the power of a little black dress as she attends the 2013 Time 100 Gala at Frederick P. Rose Hall, Jazz at Lincoln Center on April 23, 2013 in New York City.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
A little too reminiscent of her "What A Girl Wants" days, Aguilera arrives in what looks like a pink tennis dress at NBCUniversal's '2013 Summer TCA Tour' at The Beverly Hilton Hotel on July 27, 2013.
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<p><span style="font-size: 9px;">Photo: Getty Images</span>
Singer Christina Aguilera performs at 102.7 KIIS FM's Wango Tango at StubHub Center on May 10, 2014 in Los Angeles, California. Shortly after, she welcomed baby number two!
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<p><span style="font-size: 9px;">Photo: WireImage</span>
Christina Aguilera at NASA Ames Research Center on November 9, 2014 in Mountain View, California. Hard to believe she had a baby just a few months ago!
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<p><span style="font-size: 9px;">Photo: Getty Images</span>